Merge branch 'language'
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commit
b87f4a63e3
121
lib/rocco.rb
121
lib/rocco.rb
@ -61,18 +61,28 @@ end
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# `Rocco.new` takes a source `filename`, an optional list of source filenames
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# for other documentation sources, an `options` hash, and an optional `block`.
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# The `options` hash respects two members: `:language`, which specifies which
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# Pygments lexer to use; and `:comment_chars`, which specifies the comment
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# characters of the target language. The options default to `'ruby'` and `'#'`,
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# respectively.
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# When `block` is given, it must read the contents of the file using whatever
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# means necessary and return it as a string. With no `block`, the file is read
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# to retrieve data.
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# The `options` hash respects three members:
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#
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# * `:language`: specifies which Pygments lexer to use if one can't be
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# auto-detected from the filename. _Defaults to `ruby`_.
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#
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# * `:comment_chars`, which specifies the comment characters of the
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# target language. _Defaults to `#`_.
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#
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# * `:template_file`, which specifies a external template file to use
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# when rendering the final, highlighted file via Mustache. _Defaults
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# to `nil` (that is, Mustache will use `./lib/rocco/layout.mustache`)_.
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#
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class Rocco
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VERSION = '0.5'
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def initialize(filename, sources=[], options={}, &block)
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@file = filename
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@sources = sources
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# When `block` is given, it must read the contents of the file using
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# whatever means necessary and return it as a string. With no `block`,
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# the file is read to retrieve data.
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@data =
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if block_given?
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yield
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@ -85,15 +95,104 @@ class Rocco
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:template_file => nil
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}
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@options = defaults.merge(options)
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@sources = sources
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@comment_pattern = Regexp.new("^\\s*#{@options[:comment_chars]}\s?")
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@template_file = @options[:template_file]
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# If we detect a language
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if detect_language() != "text"
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# then assign the detected language to `:language`
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@options[:language] = detect_language()
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# and look for some comment characters
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@options[:comment_chars] = generate_comment_chars()
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# If we didn't detect a language, but the user provided one, use it
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# to look around for comment characters to override the default.
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elsif @options[:language] != defaults[:language]
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@options[:comment_chars] = generate_comment_chars()
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end
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@comment_pattern = Regexp.new("^\\s*#{@options[:comment_chars]}\s?")
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@sections = highlight(split(parse(@data)))
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end
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# Returns `true` if `pygmentize` is available locally, `false` otherwise.
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def pygmentize?
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# Memoize the result, we'll call this a few times
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@_pygmentize ||= ENV['PATH'].split(':').any? { |dir| executable?("#{dir}/pygmentize") }
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end
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# If `pygmentize` is available, we can use it to autodetect a file's
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# language based on its filename. Filenames without extensions, or with
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# extensions that `pygmentize` doesn't understand will return `text`.
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# We'll also return `text` if `pygmentize` isn't available.
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#
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# We'll memoize the result, as we'll call this a few times.
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def detect_language
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@_language ||= begin
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if pygmentize?
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lang = %x[pygmentize -N #{@file}].strip!
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else
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"text"
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end
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end
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end
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# Given a file's language, we should be able to autopopulate the
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# `comment_chars` variables for single-line comments. If we don't
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# have comment characters on record for a given language, we'll
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# use the user-provided `:comment_char` option (which defaults to
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# `#`).
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#
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# Comment characters are listed as:
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#
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# { :single => "//", :multi_start => "/**", :multi_middle => "*", :multi_end => "*/" }
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#
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# `:single` denotes the leading character of a single-line comment.
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# `:multi_start` denotes the string that should appear alone on a
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# line of code to begin a block of documentation. `:multi_middle`
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# denotes the leading character of block comment content, and
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# `:multi_end` is the string that ought appear alone on a line to
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# close a block of documentation. That is:
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#
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# /** [:multi][:start]
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# * [:multi][:middle]
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# * [:multi][:middle]
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# * [:multi][:middle]
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# */ [:multi][:end]
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#
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# If a language only has one type of comment, the missing type
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# should be assigned `nil`.
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#
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# At the moment, we're only returning `:single`. Consider this
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# groundwork for block comment parsing.
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def generate_comment_chars
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@_commentchar ||= begin
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language = @options[:language]
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comment_styles = {
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"bash" => { :single => "#", :multi => nil },
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"c" => { :single => "//", :multi => { :start => "/**", :middle => "*", :end => "*/" } },
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"coffee-script" => { :single => "#", :multi => { :start => "###", :middle => nil, :end => "###" } },
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"cpp" => { :single => "//", :multi => { :start => "/**", :middle => "*", :end => "*/" } },
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"java" => { :single => "//", :multi => { :start => "/**", :middle => "*", :end => "*/" } },
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"js" => { :single => "//", :multi => { :start => "/**", :middle => "*", :end => "*/" } },
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"lua" => { :single => "--", :multi => nil },
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"python" => { :single => "#", :multi => { :start => '"""', :middle => nil, :end => '"""' } },
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"ruby" => { :single => "#", :multi => nil },
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"scheme" => { :single => ";;", :multi => nil },
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}
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if comment_styles[language]
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comment_styles[language][:single]
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else
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@options[:comment_chars]
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end
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end
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end
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# The filename as given to `Rocco.new`.
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attr_reader :file
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# The merged options array
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attr_reader :options
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# A list of two-tuples representing each *section* of the source file. Each
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# item in the list has the form: `[docs_html, code_html]`, where both
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# elements are strings containing the documentation and source code HTML,
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@ -173,7 +272,7 @@ class Rocco
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# `pygmentize(1)` or <http://pygments.appspot.com>
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code_stream = code_blocks.join("\n\n#{@options[:comment_chars]} DIVIDER\n\n")
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if ENV['PATH'].split(':').any? { |dir| executable?("#{dir}/pygmentize") }
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if pygmentize?
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code_html = highlight_pygmentize(code_stream)
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else
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code_html = highlight_webservice(code_stream)
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@ -216,7 +315,7 @@ class Rocco
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def highlight_webservice(code)
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Net::HTTP.post_form(
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URI.parse('http://pygments.appspot.com/'),
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{'lang' => @options['language'], 'code' => code}
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{'lang' => @options[:language], 'code' => code}
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).body
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end
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end
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@ -82,6 +82,53 @@ class RoccoBasicTests < Test::Unit::TestCase
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end
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class RoccoLanguageDetection < Test::Unit::TestCase
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def test_basic_detection
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r = Rocco.new( 'filename.py' ) { "" }
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if r.pygmentize?
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assert_equal "python", r.detect_language(), "`detect_language()` should return the correct language"
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assert_equal "python", r.options[:language], "`@options[:language]` should be set to the correct language"
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end
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end
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def test_fallback_default
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r = Rocco.new( 'filename.an_extension_with_no_meaning_whatsoever' ) { "" }
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if r.pygmentize?
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assert_equal "text", r.detect_language(), "`detect_language()` should return `text` when nothing else is detected"
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assert_equal "ruby", r.options[:language], "`@options[:language]` should be set to `ruby` when nothing else is detected"
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end
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end
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def test_fallback_user
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r = Rocco.new( 'filename.an_extension_with_no_meaning_whatsoever', '', { :language => "c" } ) { "" }
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if r.pygmentize?
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assert_equal "text", r.detect_language(), "`detect_language()` should return `text` nothing else is detected"
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assert_equal "c", r.options[:language], "`@options[:language]` should be set to the user's setting when nothing else is detected"
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end
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end
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end
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class RoccoAutomaticCommentChars < Test::Unit::TestCase
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def test_basic_detection
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r = Rocco.new( 'filename.js' ) { "" }
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assert_equal "//", r.options[:comment_chars]
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end
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def test_fallback_language
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r = Rocco.new( 'filename.an_extension_with_no_meaning_whatsoever', '', { :language => "js" } ) { "" }
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assert_equal "//", r.options[:comment_chars]
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end
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def test_fallback_default
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r = Rocco.new( 'filename.an_extension_with_no_meaning_whatsoever' ) { "" }
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assert_equal "#", r.options[:comment_chars], "`:comment_chars` should be `#` when falling back to defaults."
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end
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def test_fallback_user
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r = Rocco.new( 'filename.an_extension_with_no_meaning_whatsoever', '', { :comment_chars => "user" } ) { "" }
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assert_equal "user", r.options[:comment_chars], "`:comment_chars` should be the user's default when falling back to user-provided settings."
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end
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def test_fallback_user_with_unknown_language
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r = Rocco.new( 'filename.an_extension_with_no_meaning_whatsoever', '', { :language => "not-a-language", :comment_chars => "user" } ) { "" }
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assert_equal "user", r.options[:comment_chars], "`:comment_chars` should be the user's default when falling back to user-provided settings."
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end
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end
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class RoccoIssueTests < Test::Unit::TestCase
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def test_issue07_incorrect_parsing_in_c_mode
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# Precursor to issue #13 below, Rocco incorrectly parsed C/C++
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